78945334272 has 132 divisors (see below), whose sum is σ = 260517858016. Its totient is φ = 22555791360.

The previous prime is 78945334253. The next prime is 78945334283. The reversal of 78945334272 is 27243354987.

It is a happy number.

78945334272 is a `hidden beast` number, since 7 + 89 + 4 + 533 + 4 + 27 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 547354 + ... + 676377.

Almost surely, 2^78945334272 is an apocalyptic number.

78945334272 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

78945334272 is an abundant number, since it is smaller than the sum of its proper divisors (181572523744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78945334272 is a wasteful number, since it uses less digits than its factorization.

78945334272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1223764 (or 1223743 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 54.

The spelling of 78945334272 in words is "seventy-eight billion, nine hundred forty-five million, three hundred thirty-four thousand, two hundred seventy-two".